Loaded silk and process of loading the silk.



UNITED snares ran-nu IGNATZ KREIDL, OF VIENNA, AlISTRIA-EHUNGARY.

No Drawing. 1

To all whom it may concern:

Be itknown that I, IGNATZ KRnmL, chemist-manufacturer, a subject of theEmperor of Austria-Hungary, and a resident of XXI/l Kohlgasse 7, Vienna,in the Empire of Austria-Hungary, have invented an Improved Loaded Silkand Process of Loading the Silk; and Idoherebydeclare the following tobe a full, clear, and exact description of the invention, such aswillenable others skilled in the .art to which it apper tains to makeand use the same.

This invention relates to the loading for.

and thereby subjected to loss in strength and elasticity.

The present invention consists in an im proved process for loading silk,in which salts of rare earth metals, especially those of zirconium,separately or together, are used in place of the usual salts of tin, for

- impregnating the material. 'Other suitable salts of rare earth metalsbeside those of zirconium, are those of the metals of the groups of thecerite and ytterite earths and of the group of the thorium earths,particularly the salts of'the representativesof these groups which arefound in group IV of'the periodic arrangement. In the case of ,ce--

rium salts, these should always be. used mixed with other salts; Thedisadvantagesof the previous processes are greatly re--.

duced in the improved process according to earth metals, especiallythose of zirconium, possess those qualities which are advantageous forloading silk, namely high atomic weight and the quality of being easilyab sorbed by the fiber. This latter quality these salts possess owing totheir-great tendency to assume colloidal formation. Another greatadvantage resulting from the use of the zirconium salts, or the saltsofother rare-earth metals, lieslin the race Specification of LettersPatent.

LOADED SILK AND PROCESS OF LOADING THE SILK.

Patented Feb. $99, T9116.

Application filed May 26, 1910. 5 Serial No. 568,638.

that they are much cheaper'than the salts at .present in use, owing tothe considerably cheaper raw materials from which they are produced. Forexample the residual prodnets of the thorium. industry may be used,which products have hitherto either not been used or only to a smallextent, as well as raw materials, which exist in enormous quantities andonly now await utilization such as zirconium earths. As residue of thethorium industry there are obtained known mixtures of salts of thecerite earth metals.

The improved process is carried out similarly to known processes, exceptin that the salts used are those of rare earth metals. The Sllk 1sdipped once or several times in a bath of a salt of rare earth metals,until the desired loading is obtained. As in existing processes the silkis washed between the baths and treated in the usual manner in a {22gbof alkali-phosphate solution or the Of course allthe baths available forthe salt of tin loading can be used in place of the alkali phosphatesolutions.

.What I claim is 1. In the process of loading silk, treating vthe silkwith a solution containing a salt of zirconium.

2. As a new article of manufacture, silk loaded with a compound ofzirconium.

3, A process of loading silk consisting in dipping silk into a solutionof a salt of zirconium, and subjecting said treated silk to a fixingbath.

4. The process of loadingsilk comprising dipping silk in a solutioncontaining a salt of a metal of the positive series of group IV'of-theperiodic arrangement. the present invention. The salts of rare 5.As anew article of manufacture silk loaded with a" compound of a metalof the positive series ofgroup IV of the periodic easily absorbed by thefiber.

7. A process of loading silk, c'omprising treating silk with a solutioncontaining Q a f 1,173,195

mixed salts of the rare earth metals. having 9. As a new article ofmanufacture, silk, high atomic weights and the quality of beloaded withabsorbed compounds of rare ing easily absorbed by the fiber. I earthmetals having a high atomic weight. 10 8. As a new article ofmanufacture, silk In testimony whereof I have signed my 5 loaded with anabsorbed compound of a' name to this specification.

rare earth metal having a high atomic l weight. g IGNATZ KREIDL.

